FRESH-WATER FISHES OF SIAM, OR THAILAND 201 



Kon, an upper tributary of the Menam Nan, H. G. Deignan obtained 

 a specimen 7.5 cm. long in April 1936, and just over the boundary from 

 Nan Province, in French Laos, Mr. Deignan collected a good series in 

 Huey Nam Puat, a mountain brook whose waters eventually reach the 

 Mekong. In the gorge of the Mechem, in Northern Thailand, A. R. 

 Buchanan and P. D. Harrisson obtained a series of specimens in July 

 1935 ; these are from 4.4 to 5.7 cm. long. All show rostral tubercles, 

 and one is a male with well-developed gonads. 



In the British Museum are many specimens collected in the Patani 

 River, Peninsular Siam, by Annandale and Robinson. These were 

 examined by the writer in December 1927. 



Of the numerous specimens at hand, the largest is 18.6 cm. long. 



When first taken from the water this fish had the back and sides like 

 burnished bronze, the underparts white, all the fins green, and the 

 caudal with a black longitudinal stripe in each lobe. 



This species was inadequately described by Cuvier and Valenciennes 

 in 1842 from Cochinchina under the name Barbus deauratus. No 

 reference was made to the peculiar features of the lips and jaws and to 

 the pores or tubercles on the rostral and suborbital regions, and the 

 dorsal spine was described as slender and smooth. In 1881 Sauvage 

 gave a fuller description from a specimen, 12.5 cm, long, from Cochin- 

 china and he brought out the presence of large pores on the snout and 

 of denticulations on the last simple dorsal ray. 



The material now available indicates that the fish called Poropuntius 

 normani is the present species. 



A vernacular name for the fish has been recorded only on Koh Chang, 

 where it is called pla kayao, a name shared by no other species. 



ACROSSOCHEILUS BANTAMENSIS (Rendahl) 



Barbus hantamensis Rendahl, 1920, p. 1, fig. 1 (head) (Northern Siam). 



The type, 13 cm. long without the caudal fin, was collected by Count 

 Nils Gyldenstolpe at Ban Tarn, apparently on the Meping, at the 

 eastern base of Doi Chiengdao, Northern Thailand. Through the 

 courtesy of Dr. Hjalmar Rendahl, of the Royal Natural History 

 Museum in Stockholm, this specimen was sent to the U. S. National 

 Museum for examination, and it is now possible to state that the fish 

 falls within the limits of the present genus and is closely related to 

 A. deauratus. 



In the original description, the species was credited with six 

 branched anal rays; the type specimen, however, has only five such 

 rays, as in all other species of the genus. Other features disclosed 

 by examination of the type are triserial uncinate teeth (2, 3, 5-5, 3, 2) 



